Expansion-bolt.



D. MASOR.

EXPANSION BOLT.

APPLICATION FILED JUNE 25, 191% Patented June 23, 1914.

2 SHEETBSHEET 1.

avwewtoz Dam/01% Wmoi" D. MASOR.

EXPANSION BOLT.

APPLIOATION FILED JUNE. 25, 1913.

Patented June 23, 1914 2 SHEETSSHEET 2.

sake of clearness.

DANIEL MASOR, OF NEW YORK, N Y.

' EXPANSION-BOLT.

Specification of Letters Patent.

Patented J urie 23, 1914.

Application filed June 25, 1913. Serial K0. 775,707.

To all whom it may concern:

Be it known that I, DANIEL MASOR, a citizen of the United States, residing at New York city, in the county 4 State of New York, haveinvented new useful Improvements in Expansion-Bolts, of which the following is a specification.

This invention relates to expansion bolts and has for its object to provide a simple, cheap and efi'ticient article of this character that may be used manytimes without disturbing the relative position of the various parts.

To these ends the invention consists in the novel details of construction and combination of parts more fully hereinafter described and particularly pointed out in the claims.

Referring to the accompanying drawings forming a part of this specification in which like numerals designate like parts in all the views: Figure 1 is a side elevational view 0 my improved bolt with parts broken away for the sake of clearness. Fig. 2 is an inner face view of one of the expanding jaw members. Fig. 3 is a cross section taken on the line 3-3 of Fig. 1.. Fig. 4 is a detail perspective view of the feed nut. Fig. 5 is a view showing a modified form of my iniproved bolt with parts broken away for the Fig. 6 is a modification of another form of my improved bolt-with arts broken away for the sake of clearness.

ig. 7 is a detail of a modified form of split feed nut showing the parts slightly separated. Fig. 8 is a modification of another form of my improved bolt with parts broken away for the sake of clearness. Fig. 9 is a view similar to Fig. 8 showing the bolt in expanded position. Fig. 10 is a still further modification of my improved form of bolt.

My improved bolt is intended for securing objects to stone, ceramic or similar types of walls wherein the ordinary bolt is unfit for accomplishing this purpose, and comprises a pair of opposed hollow jaw members 1 and 2 roughened as at 3, on their outer surfaces and provided on their inner surfaces with the oppositely disposed grooves 4: which taper inwardly from the endioward the central portion thereof.

Through the jaw members isinserted a screw threaded bolt 5 provided at its upper end with the usual head 6 and secured to its lower or screw-threedcd end is a tapering feed nut 7 which is provided on its outer of New York and and surface with a pair of oppositely disposed grooves 8 which aline at the inner or reduced end of the nut, with a pair of oppositely disposed shoulders or projections 9.

These projections are arranged for slida ly operating within the grooves 4 of the j-..

. members and to prevent the nut from becoming separated from the jaw members when in their closed position, a pair of lugs 9 are also provided at the outer'end of the grooves 4 against which the nut projections 9 abut, as clearly shown on the drawings. By slidably arranging the feed nut within the jaw members as just described, it will be seen that the feed nut will be prevented from turning and that the jaws will be expanded when the head of the bolt'is operated.

It will be noted that I have shown various forms in which my improved expansion bolt may be made, for instance in both Figs. 1

and 5 I have shown the jaw members 1 and 2 pivotally connected at one end as at 11, while in Figs. 8, 9 and 10 the jaw members are formed of one piece and resiliently connected at one end, as at 12.

In the form shown in Fig. 6 the jaw members are laterally connected by means of. the steel bands 13 and the expansion of these jaws is accomplished by means of both the feed nut 8 located at one end of the bolt and the reamed nut 14 at the other end of thebolt, when the head of the bolt is operated.

' By referring to Figs. 5, 6, 8 and 9, it will be seen that when a lag screw 15 is used, the feed nut may be split as shown, for the pur pose of casting the same and thereby doing away with the expense of machining the screw thread thereon. When this form of split feed screw is used I arrange the parts with the tongue and groove connection 16 as shown for the purpose of preventin the separation of the parts when the be t is a in use.

By providing the jawrnembers with the roughened teeth like projections, as shown, I obtain a very firm and efiicient grip when the bolt has been secured to position and one in which it is practically impossible to remove the bolt until the same has been loosened. 4

It is obvious that those skilled inthe art may vary the details of construction and arrangements of parts without departing from the spirit of my invention and therefore I 

